3.1.3.4 Spring Boot使用使用Listener组件

在Spring Boot中,使用Listener组件可以监听和响应应用中的各种事件。首先,创建自定义事件类CustomEvent,继承自ApplicationEvent。然后,创建事件监听器CustomEventListener,使用@EventListener注解标记监听方法。接下来,创建事件发布器EventPublisher,通过ApplicationEventPublisher发布自定义事件。在控制器EventController中触发事件,通过访问特定URL来测试事件发布和监听功能。此外,还可以使用Servlet规范的监听器,如ServletContextListener,监听Servlet容器的生命周期事件。通过配置类ListenerConfig注册这些监听器。启动和关闭应用时,可以在控制台看到监听器的初始化和销毁信息,验证监听器是否按预期工作。通过这些步骤,可以在Spring Boot应用中灵活地使用Listener组件来处理各种事件。
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*************************** APPLICATION FAILED TO START *************************** Description: An attempt was made to call a method that does not exist. The attempt was made from the following location: org.springframework.boot.autoconfigure.kafka.ConcurrentKafkaListenerContainerFactoryConfigurer.configureContainer(ConcurrentKafkaListenerContainerFactoryConfigurer.java:240) The following method did not exist: 'void org.springframework.kafka.listener.ContainerProperties.setKafkaAwareTransactionManager(org.springframework.kafka.transaction.KafkaAwareTransactionManager)' The calling method's class, org.springframework.boot.autoconfigure.kafka.ConcurrentKafkaListenerContainerFactoryConfigurer, was loaded from the following location: jar:file:/C:/Users/Xu.Zhang42/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/3.4.3/spring-boot-autoconfigure-3.4.3.jar!/org/springframework/boot/autoconfigure/kafka/ConcurrentKafkaListenerContainerFactoryConfigurer.class The called method's class, org.springframework.kafka.listener.ContainerProperties, is available from the following locations: jar:file:/C:/Users/Xu.Zhang42/.m2/repository/org/springframework/kafka/spring-kafka/3.0.10/spring-kafka-3.0.10.jar!/org/springframework/kafka/listener/ContainerProperties.class The called method's class hierarchy was loaded from the following locations: org.springframework.kafka.listener.ContainerProperties: file:/C:/Users/Xu.Zhang42/.m2/repository/org/springframework/kafka/spring-kafka/3.0.10/spring-kafka-3.0.10.jar org.springframework.kafka.listener.ConsumerProperties: file:/C:/Users/Xu.Zhang42/.m2/repository/org/springframework/kafka/spring-kafka/3.0.10/spring-kafka-3.0.10.jar Action: Correct the classpath of your application so that it contains compatible versions of the classes org.springframework.boot.autoconfigure.kafka.ConcurrentKafkaListenerContainerFactoryConfigurer and org.springframework.kafka.listener.ContainerProperties
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03-13
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